Title (fr)

Publication

Application

Priority

JP 1870190 A 19900129

JP 26587290 A 19901002

Abstract (en)

A membrane of a polyaniline which is treated with an electrical oxidation and an electrical reduction is used by immersing in a lubricating oil. An electrical resistance of the membrane is varied in accordance with the amount of acid which is produced by the deterioration of lubricating oil. A pair of metallic electrodes detects the change of the electric resistance of the membrane. <IMAGE>